Rehabilitation after an incisional hernia: a muscle benefit that remains exploratory

Rehabilitation started in the third week

The researchers studied 30 adults who underwent elective surgery for a W2 incisional hernia according to the European Hernia Society classification. All had undergone open retromuscular repair using the Rives-Stoppa technique.

Participants were randomly assigned to structured rehabilitation or usual postoperative care, with 15 people in each group. The program included supervised, progressive exercises, started in the third week after surgery. The abstract does not describe these exercises in enough detail to reproduce the program.

Trunk muscle performance was measured before surgery and approximately two months afterward using a Biodex dynamometer. The primary analyses examined changes in peak torque of the trunk flexor and extensor muscles at two movement speeds.

A positive signal, but limited to one measurement

At a speed of 90°/s, the change in peak trunk flexor torque was +34.3 N·m in the rehabilitation group, compared with −3.8 N·m in the control group. This difference was statistically significant, with a p-value of 0.023.

The other three primary comparisons showed no statistically significant difference: flexors at 60°/s and extensors at both speeds tested. This does not demonstrate the absence of any effect, but it prevents a conclusion that trunk strength improved overall.

Importantly, the four comparisons were performed without adjustment for multiple comparisons. This increases the risk of obtaining a significant result by chance. The isolated positive signal must therefore be interpreted cautiously.

Safety and recurrence remain uncertain

The abstract reports that no apparent increase in postoperative complications was observed in the rehabilitation group. With such a small sample, however, this observation is not enough to establish the program’s safety.

Two recurrences occurred during the 12 months of follow-up, both in the control group. The trial lacked the statistical power needed to assess this risk: these events therefore do not prove that rehabilitation prevents recurrence.

What this trial changes

This study offers a direction for evaluating early rehabilitation after this specific surgical technique, not an exercise recommendation applicable to all abdominal operations.

The authors highlight the small sample, baseline imbalances between the groups, and the fact that the measurements depend on the effort exerted during testing. Larger trials incorporating outcomes of direct importance to patients are needed before a clinical benefit can be established.

What we can take away

Structured rehabilitation shows a favorable signal on one measure of trunk strength. This trial is not enough to demonstrate better overall recovery, established safety, or fewer recurrences.